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TI-2026-30505 Aliases CVE-2026-42183GHSA-p4gq-3vxj-f4jq

Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference DoS (gatekeeper.go)

Priority LOW 12CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-476.

Summary

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From version 4.0.0 to before version 4.0.5, a nil pointer dereference in server/auth/gatekeeper.go rbacAuthorization() causes a panic (denial of service) for SSO users whose claims match a namespace-level RBAC rule but not an SSO-namespace rule, when SSO_DELEGATE_RBAC_TO_NAMESPACE=true. This issue has been patched in version 4.0.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00377 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial argo-workflows (argoproj): 4.0.5github.com/argoproj/argo-workflows/v4 (Go): 4.0.5Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
argoprojargo-workflows4.0.0 to before 4.0.54.0.5Patch availableCNA
—github.com/argoproj/argo-workflows/v4 (Go)4.0.0 to before 4.0.54.0.5Patch availableGHSA-p4gq-3vxj-f4jq
  • argo-workflows Vendorargoproj Affected 4.0.0 to before 4.0.5 Fixed in 4.0.5 Patch available CNA
  • github.com/argoproj/argo-workflows/v4 (Go) Vendor— Affected 4.0.0 to before 4.0.5 Fixed in 4.0.5 Patch available GHSA-p4gq-3vxj-f4jq

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:*4.0.0 to before 4.0.5Vulnerableargoproj
  • cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:* Versions 4.0.0 to before 4.0.5 Vulnerable ·argoproj

Remediation

  • Fix · CNA argo-workflows (argoproj) Fixed in 4.0.5
  • Fix · GHSA-p4gq-3vxj-f4jq github.com/argoproj/argo-workflows/v4 (Go) Fixed in 4.0.5 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42183
  2. 2026-10-03 Alias added: GHSA-p4gq-3vxj-f4jq

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2026-22564 Argo Workflows has unauthorized access to Argo Workflows Template CVSS 3.1CRITICAL 9.8
  • TI-2026-30603 Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor CVSS 4.0HIGH 8.2
  • TI-2026-39371 Argo Workflows: Incomplete fix for CVE-2026-31892: ArtifactGC.PodSpecPatch bypass of Strict/Secure templateReferencing CVSS 4.0HIGH 8.9
  • TI-2026-24444 WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode CVSS 4.0HIGH 8.9
  • TI-2026-30604 Argo Workflows: Exposure of artifact repository credentials CVSS 4.0HIGH 8.5
  • TI-2025-38478 argo-workflows Zip Slip path traversal allows arbitrary file write and container configuration overwrite CVSS 3.1HIGH 8.8
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences